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N/S Co‐Doped 3 D Porous Carbon Nanosheet Networks Enhancing Anode Performance of Sodium‐Ion Batteries
Author(s) -
Zou Lei,
Lai Yanqing,
Hu Hongxing,
Wang Mengran,
Zhang Kai,
Zhang Peng,
Fang Jing,
Li Jie
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201702182
Subject(s) - nanosheet , anode , materials science , porosity , carbon fibers , doping , chemical engineering , ion , nanotechnology , sodium , diffusion , electrode , optoelectronics , chemistry , composite material , composite number , metallurgy , organic chemistry , engineering , physics , thermodynamics
A facile and scalable method is realized for the in situ synthesis of N/S co‐doped 3 D porous carbon nanosheet networks (NSPCNNs) as anode materials for sodium‐ion batteries. During the synthesis, NaCl is used as a template to prepare porous carbon nanosheet networks. In the resultant architecture, the unique 3 D porous architecture ensures a large specific surface area and fast diffusion paths of both electrons and ions. In addition, the import of N/S produces abundant defects, increased interlayer spacings, more active sites, and high electronic conductivity. The obtained products deliver a high specific capacity and excellent long‐term cycling performance, specifically, a capacity of 336.2 mA h g −1 at 0.05 A g −1 , remaining as large as 214.9 mA h g −1 after 2000 charge/discharge cycles at 0.5 A g −1 . This material has great prospects for future applications of scalable, low‐cost, and environmentally friendly sodium‐ion batteries.